A good universal buck-boost driver NANJG-28 for a different type and number of batteries 1 or 2 or 3 NiMn or 1Li . Uin Uout Iin Iout Pin Pout Effic %
1NiMH 1,30 3,10 1,03 0,23 1,34 0,71 53,25
2NiMH 2,60 3,30 1,08 0,61 2,81 2,01 71,69
3NiMH 3,95 3,43 1,16 0,92 4,58 3,16 68,87
1LiIon 3,92 3,44 1,16...A good universal buck-boost driver NANJG-28 for a different type and number of batteries 1 or 2 or 3 NiMn or 1Li . Uin Uout Iin Iout Pin Pout Effic %
1NiMH 1,30 3,10 1,03 0,23 1,34 0,71 53,25
2NiMH 2,60 3,30 1,08 0,61 2,81 2,01 71,69
3NiMH 3,95 3,43 1,16 0,92 4,58 3,16 68,87
1LiIon 3,92 3,44 1,16 0,90 4,55 3,10 68,09 Many peoples complain about the failure of the output transistor. Necessary to provide additional cooling of the key elements (from the Throttle) so as not to damage it. When using lithium batteries need to be protected from a low discharge. Otherwise, such a driver will lead to damage of the battery This driver may not be -ideal- for use with crappier Alkaline or NiMH/NiCad batteries, but with higher quality cells such as Eneloop NiMor Sanyo(Panasonic) Lithium. The use of a linear current regulator AMS7136 says about its capabilities. The quality of performance and its purpose - a worthy! I'm happy! Read more

Works as stated!!
Good regulation
Quality workmanship
Compact size for boost regulator heat issues as above?
Not obvious where to put the negative battery wire - this must not go on the LED (-) as shown in one of the pictures above but on the outer rim conductor on the battery side. Is this why I...Works as stated!!
Good regulation
Quality workmanship
Compact size for boost regulator heat issues as above?
Not obvious where to put the negative battery wire - this must not go on the LED (-) as shown in one of the pictures above but on the outer rim conductor on the battery side. Is this why some units fail as above??? This board does exactly what it says on the tin but I am not sure if I prefer this mode of operation or a constant current &gt; direct supply as in SKU07612 - The difference being that as cell voltage decreases, this module pulls more current to maintain the same brightness, therefore more power and faster drain! whereas the other module will allow brightness to lessen with voltage drop when cell voltage drops to direct mode, thus being more efficient and producing more useful light for a longer period of time. Good module does what it says in the title but make sure you choose the right module for the right job! If pure output is required over discharge cycle this is the one but if light levels are allowed to reduce resulting in longer useful light choose the other module.. Read more

:- 5 modes - comes with lead wires (red, black) - HIGH, MED, LOW, STROBE, SOS modes - Clean and neat layout Q1 burned after a continous use of about 45min. After that, the boost-circuit doesnt work anymore. Current-regulation still works. You just CANT heatsink this thing properly. Q1 is not as i...:- 5 modes - comes with lead wires (red, black) - HIGH, MED, LOW, STROBE, SOS modes - Clean and neat layout Q1 burned after a continous use of about 45min. After that, the boost-circuit doesnt work anymore. Current-regulation still works. You just CANT heatsink this thing properly. Q1 is not as high as the other components which makes it really hard... bad design... If the driver is meant to work without heatsink, then i got a faulty one. And the low mode is not really different from the mid (when using 3 nimh, on 2 it is better) could have come with spring for easier battery contact Good board nevertheless Get it! Read more

Easy to use, ratings are accurate close to 1 amp when used with 18650 batt, not too hard to soldere, cheap and nice a little thick i prefer flat based one as certain flashlight only can be used, solder points a little to small for me but still i can fix it
5 modes are kinda useless i prefer less...Easy to use, ratings are accurate close to 1 amp when used with 18650 batt, not too hard to soldere, cheap and nice a little thick i prefer flat based one as certain flashlight only can be used, solder points a little to small for me but still i can fix it
5 modes are kinda useless i prefer less modes could have come with spring for easier battery contact ok cheap nice easy to use, recommended i use it with q5 and r2 led quite good and bright. to have maximum output make sure u choose the correct set of batteries or else you will get low ma Read more

First: I got the one from the picture. Works like promised. With memory. Q1 burned after a continous use of about 45min. After that, the boost-circuit doesnt work anymore. Current-regulation still works. You just CANT heatsink this thing properly. Q1 is not as high as the other components which i...First: I got the one from the picture. Works like promised. With memory. Q1 burned after a continous use of about 45min. After that, the boost-circuit doesnt work anymore. Current-regulation still works. You just CANT heatsink this thing properly. Q1 is not as high as the other components which makes it really hard... bad design... If the driver is meant to work without heatsink, then i got a faulty one. And the low mode is not really different from the mid (when using 3 nimh, on 2 it is better) would be really nice, if there is no heat-problem Read more

- 5 modes - comes with lead wires (red, black) - HIGH, MED, LOW, STROBE, SOS modes - Clean and neat layout I got a different 5mode board, the bottom had the following inscribed NANJG-112A Which happens to be a 4 group driver a plus if you know how to access those modes Taken off the net: 1- Input...- 5 modes - comes with lead wires (red, black) - HIGH, MED, LOW, STROBE, SOS modes - Clean and neat layout I got a different 5mode board, the bottom had the following inscribed NANJG-112A Which happens to be a 4 group driver a plus if you know how to access those modes Taken off the net: Specifications: 1- Input voltage: 0.9~4.2V 2- Ouput current: 1.0A 3- Modes: 4-group memory modes 4- Diameter: 17mm with gold coated 5- In low mode, it turns to alarm when the voltage is about 2.75V. At this time, please stop working, in case it is damaged because of over discharge. Instructions: 1- AA battery: about 300~500mA max. 2- Brightness is controlled by single wafer, in case the over-current happens 3- New 4-group modes are completed by connecting with the five stars one after one. 4- Donot connect the wires reversely MCU brightness adjustment (DIY): 1- 2-mode: Low(10%)/High(100%) 2- 3-mode: Low(5%)/Mid(30%)/High(100%) 3- 3-mode: Low(5%)/High(100%)/Slow Strobe(2Hz, 2 times per second) 4- 5-mode: Low(5%)/Mid(30%)/High(100%)/Fast Strobe/SOS Note: 1- Face to the front, connect to the five stars clockwise one after one, then you will get 2 modes - 3 modes - 3 modes- 5 modes Hope my next order I will get the driver in the pictures instead. But I don't mind getting the NANJG-112A boards again..... a gem Good board nevertheless Get it! Read more

Seems to pump out a lot of current on high, medium is still bright with a CREE R2 and for once low is really a low. Build quality seems good (I soldered on it and it still works :-)) I don't care for SOS and strobe. Not a big con though. I don't know how well the regulation works, there is a lot...Seems to pump out a lot of current on high, medium is still bright with a CREE R2 and for once low is really a low. Build quality seems good (I soldered on it and it still works :-)) I don't care for SOS and strobe. Not a big con though. I don't know how well the regulation works, there is a lot of loss in intensity once the batteries start to drain (might be the fault of be the batteries though) 17mm fitted the pill on my host but many pills are made for 16mm. I wouldn&#180;t start to sand this thing down.
Intensity with 1 NiMh on high and medium is about the same.
My soldering skills are very lacking so heat sinking in my application is not good. I have not noticed that it gets very hot though running on three NiMH. Good circuit board with a good selextion of modes and input voltages. Read more

Nice high mode, very bright, pulls 1.4A from 1 16340.
Nice medium and low modes too. Low is very low about 50mA and medium is somewhere right in between.
Has memory as advertised, returns to same mode you left it on (instead of next mode which would be really annoying).
LED leads came Circuit on...Nice high mode, very bright, pulls 1.4A from 1 16340.
Nice medium and low modes too. Low is very low about 50mA and medium is somewhere right in between.
Has memory as advertised, returns to same mode you left it on (instead of next mode which would be really annoying).
LED leads came pre-attached. Circuit boar looked well assembled. Modes occassionally don't switch on first try. Not sure why.
SOS has long pause between each full SOS cycle. (Not what I'm used to seeing.) I replaced the driver in 13906 with this one. Now my keychain torch has awesome output and modes with memory. Not too expensive and has the features advertised. I can't find a better driver board with modes and memory than this one here. Read more

Easy to hook up and looks neat too.The most easiest driver that i have across with compare to others.Diameter is just right not too wide. Quite good but warm up pretty quickly.So please ensure you use good heatsink to avoid overheating. Very bright puming up my K2 TFFC TWOF emitter.The strobe is...Easy to hook up and looks neat too.The most easiest driver that i have across with compare to others.Diameter is just right not too wide. Quite good but warm up pretty quickly.So please ensure you use good heatsink to avoid overheating. Very bright puming up my K2 TFFC TWOF emitter.The strobe is very fast,faster than Fenix L2D/P2D/P1D. Recommended but please ensure attach it on a proper heatsink.Though i have to wait almost a month to get it but once arrived it's great. Read more

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